Sonata in B-flat major K.333
Sonata Piano solo 7 min
In brief

This B-flat major sonata has a bright, conversational character, alternating singing episodes with crisp responses that call for clear articulation rather than excessive sentiment. You will mainly face challenges in Harmonic Analysis (3.6/5) — here you must quickly identify chord progressions to anticipate hand weight shifts and adjust hand positions — and in Dynamics/Nuances (2.5/5), which requires fine control of shading through precise fingering and wrist release to bring out voices without hardening the touch. The piece belongs to Mozart’s body of piano sonatas and is a good example of his use of sonata form and thematic contrast within the keyboard repertoire. I do not give a reference interpretation because I am not 100% confident of a specific recording to recommend for this exact work.

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Sheet music

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Is this the right work?
MusicCoach difficulty
66/100
Advanced
Likely range : 60–72/100
Confidence : 80% · high confidence
BeginnerIntermediateAdvancedVirtuoso
Exam grade
On the syllabus: Grade 7 ABRSM

Official level, taken from the exam syllabus.

Other syllabi : ABRSM Grade 6 · ABRSM Grade 7 · RCM Grade 8 · Trinity_London Grade 7 · AMEB Grade 7 · RCM Grade 8

Difficulty estimate by MusicCoach on a scale of 1 to 100.

Where this work sits
050100

Most works cluster between 45 and 65: a small score gap often marks a real step. The highlighted bar shows this work among those for the same instrument.

The MusicCoach difficulty measures a work's overall demands (technique, reading, stamina) on a shared 0-100 scale, consolidated from editorial and pedagogical reference points (Henle, exam syllabuses, curation) and our own analyses. It measures neither musical value nor the practice time YOU will need: two musicians of the same level can experience the same work very differently depending on their strengths (hands used to octaves, quick sight-reading…). The confidence reflects how many reference points sit behind the score and how well they agree — a lightly documented score is flagged “to validate”. For a truly personal bearing, the diagnostic and your space compare each work to YOUR estimated level, which the score alone cannot do.

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Difficulty sources
Henle Verlag
6
62/100 normalised · 6 obs.
Combined exam syllabi
Grade 8
68/100 normalised
ABRSM (syllabus)
Grade 8
68/100 normalised
Combined exam syllabi
Grade 7
66/100 normalised · 3 obs.
ABRSM (syllabus)
Grade 7
66/100 normalised
Combined exam syllabi
Grade 6
55/100 normalised
MusicCoach curation
Grade 8
76/100 normalised
Relative difficulty
92%
Among Wolfgang Amadeus Mozart
81%
Era
68%
Genre
Movements and pieces of this work

One rarely plays the whole work: each movement has its own level — often very different from the opus's overall score.

Estimated skills
Theory
Knowledge of forms
1
Theory
Harmonic analysis
2
Tone
Touch control
1
Interpretation
Dynamics
2
Interpretation
Phrasing
2
What to play next?

Each suggestion combines difficulty gap, risk, confidence and skill overlap. The first two cards in each column are the most useful pedagogically.

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